1 / 21

Core Issues in Digital Preservation: Storage and Maintenance

Core Issues in Digital Preservation: Storage and Maintenance. Jacob Nadal, Preservation Officer UCLA Library. Storage and Maintenance. Digital Repositories. Ingest: Get things in Manage: Take care of them Disseminate: Get them to users. OAIS (Open Archival Information System).

artan
Download Presentation

Core Issues in Digital Preservation: Storage and Maintenance

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Core Issues in Digital Preservation:Storage and Maintenance Jacob Nadal, Preservation OfficerUCLA Library

  2. Storage and Maintenance

  3. Digital Repositories • Ingest: Get things in • Manage: Take care of them • Disseminate: Get them to users

  4. OAIS (Open Archival Information System) Start here: http://en.wikipedia.org/wiki/Open_Archival_Information_System Full Standard: http://public.ccsds.org/publications/archive/650x0b1.PDF

  5. OAIS v Core IT • OAIS contains elements that are common in managed IT environments • Database administration • System Backup • Media replacement • OAIS has concepts that are more specifically archival • Preservation Planning and Metadata take a longer view than routine updates and digital asset management • “Designated Community” of users determines if archive is usable • “Information Packages” as distinct, granular objects • In the loosest form of backup, objects may not be handled with the level of independence OAIS expects

  6. OAIS Entities: Data Management

  7. OAIS Entities: Archival Storage

  8. Trusted Digital Repositories • OAIS compliance • Administrative responsibility • Organizational viability • Financial sustainability • Technological and procedural suitability • System security • Procedural accountability

  9. Bare bones, or, not not digital preservation? • A 1TB hard drive: $199 • Another 1TB hard drive: $199 • Yet another 1TB hard drive: $199 • That’s $600 for 1TB, very safe, for a year • Software • Text Editor: Pref. w/XML support • PDF: Output PDF/A • Image: Output TIFF, JPEG 2000; ICC profiles • Audio: Output .WAV (Uncompressed PCM) • Video: Wait if possible; uncompressed .AVI

  10. This is not digital preservation, but it is a viable way of getting digitized content through the year. Don’t avoid digitization because you don’t have a digital repository set up. Don’t just keep digitizing or promising long-term preservation without developing (or contracting with) a repository

  11. Not so bare bones • Fedora Digital repositories • LOCKSS networks • DIY Repositories

  12. Not so bare bones • Fedora digital repositories software: • Identifies digital objects • Asserts relationships among digital objects • Links "behaviors" (i.e., services) to digital objects. • Open source software: Free to use and develop on your own (http://fedora-commons.org/) • Also available through a fee-based service called DuraCloud (http://www.duracloud.org) • Fedora (repository) + D-Space (interface) • $4,500-$7,000 / year for .5 TB – 1 TB • $1,000/TB per year for extra storage

  13. Fedora • Kahn and Wilensky Framework • www.cnri.reston.va.us/k-w.html • Supports RDF – “semantic triples” • [1]Object [2] described by [3] metadata • [1] Page image [2] is part of [3] eBook • Triples relate well-defined, persistently identified bitsreams or “digital objects”

  14. Distributed Storage "...let us save what remains: not by vaults and locks which fence them from the public eye and use in consigning them to the waste of time, but by such a multiplication of copies, as shall place them beyond the reach of accident." --Thomas Jefferson to Ebenezer Hazard, Philadelphia, February 18, 1791.

  15. LOCKSS • Costs: • Commodity, desktop PC grade, hardware: $100s - $1,000s • LOCKSS Alliance Fee (or negotiated price for Private LOCKSS): • $1,080 (Assoc. Colleges), $2,160 (BA Colleges) up to $10,800 (Tier 1 Research Universities)

  16. Private LOCKSS • Institutions form a mutual-aid system to maintain each other’s content • MetaArchive (www.metaarchive.org/) • Alabama Digital Preservation Network (www.adpn.org/) • Other private networks: (www.lockss.org/lockss/Private_LOCKSS_Networks)

  17. Third-party services • OCLC Digital Archive • ContentDM • http://www.oclc.org/digitalarchive/ • Cloud Services • Currently $500 - $1,000 / TB per year • Some level of on-your-own software development • Example: http://aws.amazon.com/s3/ • Example: http://www.sdsc.edu/services/StorageBackup.html • Commercial Data Centers

  18. Pros & Cons of Outsourcing • Pay for what you need, when you need it (“scalable storage”) • Pay for overhead and common denominator services • Reduces the need for some kinds in-house expertise, and people are expensive • You need to make a connection between the repository and your access system

  19. Cornell/ICPSRDigital Preservation Management Framework

  20. http://www.jacobnadal.com/247 Storage and Maintenance Q&A

More Related